Robust Voltage Control of Autonomous Distributed Generation System Using Fractional-Order Sliding Mode Control

This paper proposes an effective control approach based on fractional order sliding mode control (FOSMC) for autonomous distributed generation systems (ADGS). The design of the controller is based on the mathematical model of the system formulated in the abc reference frame and by including a static equation to reduce the number of control variables for the system to become square and optimize the control signals. Stability and robustness analyses are performed using Lyapunov's theory to demonstrate the robustness of the proposed controller against model uncertainties, while ensuring low total harmonic distortion (THD) even in the presence of non- linear loads. The presented simulation results obtained using MATLAB/Simulink software confirm the high performance and superiority of the proposed controller against other conventional controllers in regulating the output voltage of the ADGS for different types of load (balanced, non-linear).